EP1667202A1 - Elektrische Glühlampe für Fahrzeugscheinwerfer - Google Patents

Elektrische Glühlampe für Fahrzeugscheinwerfer Download PDF

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Publication number
EP1667202A1
EP1667202A1 EP05016086A EP05016086A EP1667202A1 EP 1667202 A1 EP1667202 A1 EP 1667202A1 EP 05016086 A EP05016086 A EP 05016086A EP 05016086 A EP05016086 A EP 05016086A EP 1667202 A1 EP1667202 A1 EP 1667202A1
Authority
EP
European Patent Office
Prior art keywords
filament
incandescent
lamp
incandescent lamp
lamp vessel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05016086A
Other languages
German (de)
English (en)
French (fr)
Inventor
Manfred Bühler
Klaus Wittmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1667202A1 publication Critical patent/EP1667202A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K7/00—Lamps for purposes other than general lighting
    • H01K7/02—Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp

Definitions

  • the invention relates to an electric incandescent lamp according to the preamble of patent claim 1.
  • Such an incandescent lamp is disclosed for example in the patent US 5,508,587.
  • This document describes a unilaterally capped, used for coupling light in a light guide halogen incandescent lamp with a lamp vessel, the base remote end is designed as an optical lens, and arranged within the lamp vessel incandescent whose outer contour has the lateral surface of a truncated cone as an envelope.
  • the electric incandescent lamp according to the invention has at least one incandescent filament arranged inside a translucent lamp vessel, the outer diameter of which increases continuously from a minimum value at a first filament end to a maximum value at the second filament end, whereby according to the invention the minimum value D1, the maximum value D2 and the length L of the at least one filament, the following condition is met: D 2 - D 1 2 ⁇ L ⁇ 0 . 0875
  • the at least one incandescent filament Due to the smaller outer diameter at the first incandescent filament end, the at least one incandescent filament has a higher luminance at this end. In addition, this incandescent filament corresponds due to its smaller outer diameter rather the ideal of a point light source. Therefore, the incandescent lamp according to the invention is particularly well suited for projection applications, for example as a light source in a vehicle headlight.
  • the light emitted by the filament end with the first filament end can advantageously be used to produce a sharp cut-off line of the low beam by projecting it into the far field in front of the headlight and the light emitted by the second filament end into the near field of the headlight, is projected directly in front of the vehicle.
  • the conicity of the at least one incandescent filament of the incandescent lamp according to the invention is limited to a maximum value of 0.0875 according to the above inequality. That is, the outer sides or outer diameter of the turns of the at least one incandescent filament are arranged on the lateral surface of a circular cone whose opening angle at the peak is a maximum of about 10 degrees.
  • the incandescent lamp according to the invention is advantageously designed as a single-ended incandescent lamp, that is, one end of its lamp vessel is provided with a base, wherein the first incandescent filament end of the at least one incandescent filament faces the base provided with the lamp vessel.
  • vehicle headlamps usually single ended lamps are used, which are mounted via a rear opening in the headlamp reflector, so that the socket is fixed in a holder of the rear opening. by virtue of In this orientation of the lamp, the light generated by the socket-near end of the incandescent filament is projected into the area of the cut-off line or the far field of the spotlight.
  • the near-bottom end of the filament is therefore preferably formed to achieve the aforementioned advantages of the first filament end with the smaller outer diameter.
  • the at least one filament is aligned axially, that is, the filament axis of the at least one filament extends parallel to the longitudinal extension of the lamp vessel or the bulb and in the case of an axisymmetric lamp vessel parallel to the longitudinal axis or even in the longitudinal axis of the lamp vessel.
  • the length L of the at least one incandescent filament of the incandescent lamp according to the invention is advantageously in a value range of 4.0 millimeters to 6.5 millimeters in order to use the incandescent lamp as a light source in a vehicle headlight can.
  • the gradient factor of the at least one incandescent filament of the incandescent lamp according to the invention is preferably less than 1.9 and greater than 1.3 for manufacturing reasons. With a slope factor of 1.9 and greater, there is a risk that the filaments get caught in the Glühwendelzu Switzerlandvorides and can not be isolated. With slope factors of 1.3 and smaller, electrical shorts could occur between adjacent turns of the filament.
  • FIG. 2 schematically shows a halogen incandescent lamp for a vehicle headlight according to the first exemplary embodiment of the invention.
  • This halogen incandescent lamp 1 has an electrical power consumption of 55 watts and a nominal voltage of 12 volts and is used to generate the low beam in a motor vehicle headlight.
  • the halogen incandescent lamp 1 has a quartz glass lamp vessel 10 having a sealed end 11 provided with a metallic pedestal 3.
  • an incandescent filament 2 made of a single-spiral tungsten wire 200 is arranged.
  • the filament 2 is axially aligned within the lamp vessel 10, that is parallel to the longitudinal axis of the lamp vessel 10 and lies in the longitudinal axis of the lamp vessel 10.
  • the two uncoiled Wendelab réelle 21, 22 of the filament 2 are each a gas-tight in the sealed end 11 of Lamp vessel 10 embedded molybdenum foil 111, 112 connected to a protruding from the lamp vessel 10 power supply wire, which is electrically conductively connected to the contact lug 4 and with the base sleeve 3.
  • FIG. 1 schematically shows details of the incandescent filament 2 which is used to produce the low beam in the case of the halogen incandescent lamps depicted in FIGS. 1 and 3.
  • the filament 2 has an outer contour that corresponds substantially to the lateral surface of a truncated cone.
  • the filament 2 has a length L of 4.33 millimeters, an outer diameter D1 of the first turn of 0.48 millimeters and an outer diameter D2 of the last sixteenth turn of 1.24 millimeters.
  • the thickness of the helical wire 200 is 155.2 microns.
  • the gradient factor of this filament is 1.8.
  • the first filament end 23 with the reduced outer diameter 23 is facing the base 3 and 8 in the lamps according to Figures 1 and 3.
  • FIG. 3 schematically shows a halogen incandescent lamp for a vehicle headlight according to the second exemplary embodiment of the invention.
  • This halogen incandescent lamp is a two-filament halogen incandescent lamp 5 with two incandescent filaments 2, 6, which serve to produce the low beam and the high beam of the vehicle.
  • This halogen bulb 5 is intended for operation on a vehicle electrical system voltage of nominal 12 volts. It has a lamp vessel 7 made of tempered glass, for example of aluminosilicate glass, with a sealed end 71, which is provided with a metallic base 8. Within the lamp vessel 7, a first filament 6 for generating the high beam and a second filament 2 for generating the low beam of the vehicle are arranged.
  • the filament 2 has the properties described above and is therefore provided in Figures 1, 2 and 3 with the same reference numeral.
  • the filament 2 is axially aligned in the lamp vessel 7, so that its first end 23 faces the sealed end 71 and the base 8, and also it is partially surrounded by a screening cap 9.
  • the two incandescent filaments 2, 6 are supported by three Stromzufiihrung wires 91, 92, 93, which are led out through the sealed end 71 of the lamp vessel 7 and connected to one of the three electrical terminals 94 of the lamp 5, and supplied with electrical energy.
  • the first coil end 21 of the incandescent filament 2 enveloped by the molybdenum tube 25 is welded to the power supply wire 91, and the second coil end 22 of the incandescent filament 2 enveloped by the molybdenum tube 26 is welded to the shielding cap 9.
  • the invention is not limited to the embodiments explained in more detail above.
  • the minimum value D1 for the outer diameter of the first turn of the incandescent filament 2 may be in the range of 0.4 millimeters to 1.2 millimeters, and the maximum value D2 for the outer diameter of the last turn of the incandescent filament 2 may be in the range of 0.6 millimeters to 2 millimeters , Assume 2 mm.
  • the thickness of the coil wire 200 can be reduced and the number of turns of the filament 2 can be increased to the filament 2 to a higher Vehicle voltage as 12 volts, for example, to adapt to a vehicle electrical system voltage of nominal 24 volts.
  • the invention is particularly suitable for H1 lamps, H7 lamps and H4 lamps.
  • the incandescent filament 2 may additionally have at its first end 23 a reduction factor which is reduced compared to the second end 24.

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP05016086A 2004-08-19 2005-07-25 Elektrische Glühlampe für Fahrzeugscheinwerfer Withdrawn EP1667202A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004040417A DE102004040417A1 (de) 2004-08-19 2004-08-19 Elektrische Glühlampe für Fahrzeugscheinwerfer

Publications (1)

Publication Number Publication Date
EP1667202A1 true EP1667202A1 (de) 2006-06-07

Family

ID=35721529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05016086A Withdrawn EP1667202A1 (de) 2004-08-19 2005-07-25 Elektrische Glühlampe für Fahrzeugscheinwerfer

Country Status (6)

Country Link
US (1) US20060038471A1 (zh)
EP (1) EP1667202A1 (zh)
JP (1) JP2006059813A (zh)
KR (1) KR20060053115A (zh)
CN (1) CN1737988A (zh)
DE (1) DE102004040417A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008101832A1 (de) * 2007-02-19 2008-08-28 Osram Gesellschaft mit beschränkter Haftung Halogenglühlampe
EP2465134B1 (de) * 2009-08-14 2016-02-17 OSRAM GmbH Halogenglühlampe für fahrzeugscheinwerfer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004040415A1 (de) * 2004-08-19 2006-02-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Glühlampe für Fahrzeugscheinwerfer
DE102006052951A1 (de) * 2006-11-09 2008-05-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Halogenglühlampe
DE102006052950A1 (de) * 2006-11-09 2008-05-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Halogenglühlampe
US8581492B2 (en) 2010-10-20 2013-11-12 General Electric Company Electric incandescent lamp for vehicle headlights with new filament geometry
KR20220147670A (ko) * 2020-03-02 2022-11-03 어플라이드 머티어리얼스, 인코포레이티드 급속 열 어닐링 램프들을 위한 원뿔형 코일

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859601A (en) * 1929-03-23 1932-05-24 George D Rice Therapeutic lamp
DE807520C (de) * 1949-04-05 1951-06-28 Leitz Ernst Gmbh Leuchtkoerper fuer Gluehlampen
GB1017828A (en) * 1962-08-14 1966-01-19 Gen Electric Co Ltd Improvements in or relating to electric lamps
US5508587A (en) 1992-11-13 1996-04-16 Williams; Ronald R. Incandescent lamp use with an optical fiber
EP1104010A1 (en) * 1999-05-24 2001-05-30 Ushio Denki Kabushiki Kaisya Incandescent lamp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1143909A (en) * 1913-03-14 1915-06-22 Herman J Jaeger Metallic-filament lamp.
US2454765A (en) * 1944-09-28 1948-11-30 Tung Sol Lamp Works Inc Electric head lamp projector and incandescent lamp therefor
DE10001007A1 (de) * 2000-01-12 2001-07-19 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Leuchtkörper für eine Glühlampe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859601A (en) * 1929-03-23 1932-05-24 George D Rice Therapeutic lamp
DE807520C (de) * 1949-04-05 1951-06-28 Leitz Ernst Gmbh Leuchtkoerper fuer Gluehlampen
GB1017828A (en) * 1962-08-14 1966-01-19 Gen Electric Co Ltd Improvements in or relating to electric lamps
US5508587A (en) 1992-11-13 1996-04-16 Williams; Ronald R. Incandescent lamp use with an optical fiber
EP1104010A1 (en) * 1999-05-24 2001-05-30 Ushio Denki Kabushiki Kaisya Incandescent lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008101832A1 (de) * 2007-02-19 2008-08-28 Osram Gesellschaft mit beschränkter Haftung Halogenglühlampe
US8011798B2 (en) 2007-02-19 2011-09-06 Osram Gesellschaft mit beschränkter Haftung Halogen incandescent lamp
EP2465134B1 (de) * 2009-08-14 2016-02-17 OSRAM GmbH Halogenglühlampe für fahrzeugscheinwerfer

Also Published As

Publication number Publication date
DE102004040417A1 (de) 2006-02-23
KR20060053115A (ko) 2006-05-19
US20060038471A1 (en) 2006-02-23
CN1737988A (zh) 2006-02-22
JP2006059813A (ja) 2006-03-02

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